Blower



(5. BLANTON May 17, 1955 BLOWER 3 Sheets-Sheet l Grover B/anfon JNVENTOR.

Filed 001;. 12, 1953 G. BLANTON May 17, 1955 BLOWER Filed eat. 12, 1953 3 Sheets-Sheet 2 IN V EN TOR.

Grover 5/0/7700 BLOWER a Sheets-Sheet 3 Filed Oct. 12, 1953 on MS Graver B/anfon INVENTOR.

United States Patent BLOWER Grover Blanton, Deming, N. Mex., assignor to Hosdreg Company, Inc., Deming, N. Mex., a corporation of New Mexico Application October 12, 1953, Serial No. 385,383 1 Claim. (Cl. 230-141) This invention relates to a blower and particularly to a Roots type blower constructed substantially of aluminum and having the rotors mounted for compensation of expansion therein.

The movement of large quantities of air at relative low pressures is readily accomplished by means of a socalled Roots type blower in which a pair of meshing im pellers entrap and force the air from an inlet port to an outlet port.

The present invention relates to a Roots type blower having a body constructed substantially of aluminum; utilizing impellers cast integrally upon the shafts; having the shafts each rigidly mounted at one end with respect to the lower frame and having the other end floatably mounted therein; and providing means for securing proper meshing of the impellers.

In the construction, according to the invention, the body of the blower together with the end closure plates are constructed of aluminum and the impeller bodies are also made of aluminum integrally cast on the inn peller shafts and the end plates and impellers are protected by means of a steel plate interposed in bearing position between the ends of the rotors and the closure plates.

It is accordingly an object of the invention to provide an improved blower.

It is a further object of the invention to provide a blower constructed substantially of aluminum.

It is a further object of the invention to provide an improved mounting for the rotors of a blower.

Other objects and many of the attendant advantages of the present invention will be apparent from the following detailed description taken in conjunction with the accompanying drawing in which:

Figure 1 is a top plan view of a blower according to the invention;

Figure 2 is an end elevation of the blower;

Figure 3 is a sectional elevation of the blower taken substantially along the plane indicated by the section line 3-3 of Figure 1;

Figure 4 is an enlarged cross section through the blower taken substantially on the plane indicated by the section line 4-4 of Figure 1;

Figure 5 is an end elevation of the device showing the quick actuating connections to the manifold; and

Figure 6 is a plan view of a locking ring for detachably securing a manifold to the ports of the blower.

In the exemplification according to the invention a body 10 is constructed of aluminum and is provided with heat dissipating fins 12. End closure plates 14 and 16 are attached to opposite ends of the body 10 and a mounting bracket 18 is attached to and preferably integral with one of the end closure plates such as the closure plate 16 and is provided with a closure bracket 20 secured by means of screws 22 for mounting the device on any suitable base.

End closure plates 14 and 16 are secured to the body member by means of suitable fasteners 24 and 26 which preferably extend through the rim flanges of the end members 14 and 16 and are screwed into suitable apertures 28 in the body member 10. The body member 10 is provided with a pair of oppositely disposed apertures 30 and 32 which are to be designated as inlet and outlet apertures. Manifolds 34 and 36 are usually attached to the inlet and outlet apertures and preferably the manifolds 34 and 36 are substantially identical in construction as will presently be described.

A pair of parallel shafts 40 and 42 are mounted in the body 10 and extend transversely between the apertures 30 and 32 and impeller blades 44 and 46 are integrally cast therewith.

A steel liner plate 48 is placed on the end closure plate 14; and a similar steel liner plate 50 is mounted on the end closure plate 16 to provide bearing surfaces between the aluminum impellers 44 and 46 and the aluminum end plates 14 and 16. 4

Since the operation of the device provides a considerable difference in pressure across the device, O-rings 52, 54, 56 and 58 are provided in recesses in the end plates 14 and 16 respectively to prevent the escape of air pressure through the shaft apertures and also to prevent oil from the bearings from entering into the pump.

The shaft 40 is provided with anti-friction bearings 60 and 62 mounted at opposite ends thereof. The devices 60 and 62 include inner and outer races with suitable bearing elements received therebetween. Between the impeller 44 and the bearing 60 is placed a bearing spacer sleeve 64 and a nut 66 is threaded on the end of the shaft 40 to secure the inner race of the bearing 60 rigidly between the nut 66 and the spacer sleeve 64.

The bearing 60 is received in a recess 68 in the end plate 14 and the recess 68 is provided with a shoulder 70 for receiving the outer race of the bearing 60.

The shaft 42 is likewise provided with a bearing spacing sleeve 72 and a nut 74 retains the inner race of an anti-friction bearing 76 on the end of the shaft 42 and the bearing 76 is received in a bearing recess, 78 having a spacer shoulder 80 therein. A retainer'plate 82 is provided with an offset recess 84 to receive the end of the shaft 40 and an olfset recess 86 to receive the end of the shaft 42. The plate 82 is provided with an inwardly directed shoulder 88 which receives the-outer race of the bearing 60 between the projection 88 and the shoulder 68 and the plate 82 is secured by means of suitable fasteners, such as the bolts 90, so that the outerrace is rigidly secured between the shoulder 70 and the projection 88. A spacer 92 is provided between the closure plate 82 and the end plate 14 so that the bearing race 76 is rigidly secured between the spacer member 92 and the shoulder 80.

The plate 82 is provided with an annular projection 94 and the end of the shaft 40 extends therethrough and is provided with a keyed end member 96 for connection with any suitable driving device.

Since the inner races of bearings 60 and 76 are rigidly fixed with respect to the shafts 40 and 42 and with respect to the end housing 14 the inner races of bearings 62 and 98 are slidably mounted on the opposite ends of the shafts so that bearings 62 and 98 are freely floating for longitudinal motion in the end plate 16 so that expansion of the shafts 40 and 42 will in no wise bind the bearings, the space between the bearings being controlled by the distance between the recesses provided for the bearings.

A drive gear 104 is rigidly secured on shaft 40 by means of a lock nut 108. The hub is fixed on the end of the shaft 42 by means of a lock nut 112 and an idler gear 114 is mounted on the hub 110 by means of bolts 116 which are mounted in longitudinal slots so that the idler gear 114 may be angularly adjusted with respect to the gear 104 and pulled down on taper 106 to a fixed position so that the blades 44 and 46 may be arranged in proper meshing relation.

A housing is placed over the gears 104 and so that a suitable oil bath may be applied therein.

The blower is provided with exhaust and intake ports 30 and 32, Figure 1 and Figure 4, which are finished to identical specifications to permit a manifold to be attached to the exhaust port as in position indicated at 34, Figure l and Figure 4; or to the intake port as in position 36, Figure 1 and Figure 4. Manifold is held on either port by means of a toggle-locking two-piece clamp ring which is designed to permit rapid attach ment or detachment of the manifold.

The clamp ring 160 is provided with two sections 162 and 164 each provided with a clamping groove 166 having sloping side walls. The outer ends of the ports 30 and 32 are provided with annular collars 163 and 170 and the manifold 128 is provided with an annular collar 172 adapted to meet in abutting relation. Preferably the manifold 128 is provided with a counterbore 174 to receive a guide sleeve 176 to properly and rapidly align the abutting collars 168 and 172. The section 162 is provided adjacent one end thereof with a pair of spaced ears 178 between which is journaled a hinge 180 by means of a hinge pin 182. The adjacent end of section 164 is provided with a pair of cars 184 in which is journaled a pin 186 having an eccentric cam portion 188. The hinge 180 is provided with an'aperture 190 in which the cam 188 is received. An angulated handle 192 is rigidly fixed to pin 186 in such position that when the cam 188 has just passed dead center in the contracted position the handle 192 locks against the section 164. The opposite end of the section 162 is provided with a pair of cars 196 between which is journaled an eye bolt 198 by means of a pivot pin 200. The eye bolt 198 is provided with a threaded end 202 on which is provided a wing nut 204. The section 164 is provided with a U-shaped car 206 having an extended portion 208 into which the eye bolt 198 may be placed. The clamp ring may be placed around any suitable support and engaged by swinging the eye bolt 198 into the U-shaped car 208 and the wing nut 204 tightened to retain the clamp in position after which the cam 188 is actuated to clamp the ring in place. By means of these features of manifold interchangeability the blower may readily be used to supply air under pressure; or to draw air by vacuum lift.

. Manifold 34 or 36 is provided with connecting member 130 which is provided with a recess 13 6 in which is placed a suitable protective screen 138. Manifold member 130 is provided with quick locking connections 150 and 152 controlled by means of spring actuated plungers 154 and 156 so that flexible air lines may be quickly attached to, or detached from the manifold.

it will be apparent that the present invention provides a lightweight blower constructed substantially of aluminum and having the rotors or impellers mounted therein so that one end is firmly fixed with respect to the device and the other end of the blower is free to expand.

For purposes of exemplification, a particular embodiment of the invention has been shown and described according to the best present understanding thereof. However, it will be apparent to those skilled in the art that many changes and modifications can be made therein without departing from the true spirit and scope of the invention.

What is claimed as new is as follows:

A blower comprising an aluminum body having opposed inlet and outlet ports therein, a pair of aluminum closure plates secured on the ends of said body, a pair of parallel shafts mounted in said closure plates and extending transversely between said inlet and outlet ports, aluminum impellers cast on said shafts, steel wear plates interposed between the ends of said impellers and said closure plates, said closure plates having bearing receiving recesses, pairs of bearings having inner and outer races in said recesses the inner races of one of each of said pairs of bearings being fixedly mounted on first ends of said shafts, the inner races of the other of each of said pairs of bearings being slidably mounted on second ends of said shafts, shoulders in the recesses in one of said closure plates, a retainer plate having projections, means clampingly securing said retainer plate to said one of said closure plates with said outer races of bearings clampingly engaged between said projections and said shoulders, spacer sleeves on said first ends of said shafts engaging said impellers, and nuts threadedly secured on said shafts clainpingly holding said inner races of bearings fixedly mounted on said shafts between said nuts and said sleeves.

References Cited in the file of this patent UNITED STATES PATENTS 1,771,863 Schmidt July 29, 1930 1,879,136 Dubrovin Sept. 27, 1932 1,927,395 Edwards Sept. 19, 1933 1,972,632 Patton Sept. 4, 1934 2,176,322 Barrett Oct. 17, 1939 2,336,294 Rea Dec. 7, 1943 2,619,039 Maisch Nov. 25, 1952 2,660,259 Morehouse Nov. 24, 1953 

